Chapter 13, Problem 135QGW

Interpretation Introduction

Interpretation: The mass percent, molarity and molality of sugar dissolved in water are to be determined.

Concept Introduction: A solution comprises of two components, a solute and a solvent.

The mass percent of a substance is represented as:

$\text{Mass percent}=\frac{\text{mass solute}}{\text{mass solute}+\text{mass solvent}}\times 100\%$

Molarity of substance is defined as the moles of solute present per liter of solution. It is expressed as:

$\text{Molarity}=\frac{\text{moles solute}}{\text{Liter solution}}$

The molality of substance is expressed as:

$\text{Molality}=\frac{\text{moles solute}}{\text{kg solvent}}$